Dockerfile

ARG swift_version=5.7
ARG ubuntu_version=focal
ARG base_image=swift:$swift_version-$ubuntu_version
FROM $base_image
# needed to do again after FROM due to docker limitation
ARG swift_version
ARG ubuntu_version

# set as UTF-8
RUN apt-get update && apt-get install -y locales locales-all
ENV LC_ALL en_US.UTF-8
ENV LANG en_US.UTF-8
ENV LANGUAGE en_US.UTF-8

# tools
RUN mkdir -p $HOME/.tools
RUN echo 'export PATH="$HOME/.tools:$PATH"' >> $HOME/.profile

# swiftformat (until part of the toolchain)

ARG swiftformat_version=0.51.12
RUN git clone --branch $swiftformat_version --depth 1 https://github.com/nicklockwood/SwiftFormat $HOME/.tools/swift-format
RUN cd $HOME/.tools/swift-format && swift build -c release
RUN ln -s $HOME/.tools/swift-format/.build/release/swiftformat $HOME/.tools/swiftformat